Compensating gearing.



No. 672,784. Patented Apr. 23, mm.

J. F. KRAMER & J. H. BLUM.

GUMPE'NSATING GEARING.

(Application flied Jan. 23, 1901.

(Np Model.)

IN VENTOHJ' WITNESSES A TTORNEYS rm: nonms PEYERS cc. momumoq wAsuma'rcn. n. c.

i tion on the liney 'y of Fig. 1.

. :UNITED STATES ATENT FFICE.

JOSEPH FRANCES KRAMER AND JOHN HJALMAR BLUM, OF GUNDERSON,

MONTANA.

COMPENSATING GEARING.

SPECIFICATION forming part of Letters Patent No. 672,784, dated April 23, 1901.

Application filed January 23, 1901. $eria1No. 44,440. iNo model.)

in Compensating Gearing, of which the following is a full, clear, and exact description.

This invention relates to improvements in compensating gearing particularly adapted for wheeled vehicles, the object being to provide simple gearing to permit of the rotation of the two opposite traction-wheels at different rates of speed while turning corners or moving on a curve.

We will describe compensating gearing embodying our invention and then point out the novel features in the appended claims.

Reference is. to be had to the accompanying drawings, forming part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional elevation of gearing embodying our invention. Fig. 2 is a section on the line as a; of Fig. 1, and Fig. 3 is a sec- The driving-shaft or axle consists of two I sectionsl 2, and on each section a tractionwheel 3 is rigidly mounted. Theends of the two shaft -sections extend into a sleeve 4, which for convenience is made in two sections bolted together. On the shaft-section 1, Within the sleeve 4:, is a ratchet-wheel 5, and

on the section 2, within said sleeve,is a ratchetsprocket-wheel.

Wheel 6, the sleeve being suitably recessed to receive said ratchet-wheels. Mounted on the sleeve and having a slight rotary motion relatively thereto is a sprocket-wheel 7, from which a chainis designed to extend to a motor. A limited movement of the sprocket- Wheel circumferentially of the sleeve is permitted by a lug 8, extended from the sleeve into a recess 9,. formed in the hub of the It will be noted that the sprocket-wheel is also made in two sections bolted together.

Arranged in the sleeve are pawls 10 and 11,

coacting respectively with the ratchet-wheels 5 and 6. These pawls are pivoted and each consists of oppositely-extended fingers for engaging with the teeth of the ratchet-wheels.

Extended outward from the pivotal point of each pawl and into a recess formed in the hub of the sprocket-wheel is a finger 13, de-

signed to be engaged on one side with a spring 1 1 and on the opposite side by a spring 15, these springs being placed in-recesses formed in the hub of said sprocket-wheel. A brakeband 16, of spring metal, passes around one end of the sleeve 4 and has its ends connected to a fixed portion 17 of the vehicle, and attached to this band, so as to swing relatively thereto, is an eccentric clutch 18.

In operation, upon turninga corner orcurve and assuming the wheel of the shaft-section 1 'to be at the inner side, and consequently moving at a less speed than the other Wheel, the motion imparted to the sprocket-wheel will cause the pawl engaging with the ratchet 5 to hold the shaft in rigid connection with the sleeve, so that said shaft moves at the same rate of speed as the sleeve and the sprocket-wheel, while the pawl coacting with the ratchet-wheel 6 will slide over the teeth thereof during the slow rotary movement of the wheel on the shaft 1. In backing or re versing the motion imparted to the sprocketwheel will turn the sleeve until the clutch 18, riding upon the top of said sleeve, will draw the band 16 into tight engagement with the sleeve, holding it still, and during this sliding movement the sprocket-wheel will be turned to bring the finger 13 into engagement with the forward spring 15, when the clutch 18 will drop to the opposite side, releasing the brake-band 16.

tions, ratchet-wheels on adjacent ends of the shaft-sections, a sleeve surrounding said ends of the shaft-sections and in which said ratchetwheels are arranged, double-arm pawls coacting with the ratchet-wheels, springs coacting with the pawls, and a driving-wheel roo mounted on the sleeve, substantially as specified.

2. Thecombination with a driving-shaft, consistingof two sections,'of compensating gearing, comprising ratchet-wheels mounted on the adjacent ends of the two shaft-sections, a sleeve surrounding said ends of the shaft-sections, double-arm :pawls mounted to swing in said sleeve and ooacting with the ratchet-wheels, a sprocket-wheel having a slight rotary motion on said sleeve, springs arranged'inrecesses formed-in the hub of said 3 sprocket-wheel and adapted for engagement with fingers extended from the pawls, and a brake-strap for automatically acting on the sleeve,- substantially as specified. 3. In avehicle, opposite driving-wheels shaft-sections -on which said wheels are mounted, a sleeve into which the adjacent ends of said shaft-sections extend, ratchetwheels on the ends of the shaft-sections within the sleeve, pawls carried by the sleeve and coaoting with the ratchet-Wheels, and a driving-wheel having movement on the sleeve for reversing the pawls, substantially as specified.

In testimony whereof we have signed our names to thisspecification in the presence of two subscribing Witnesses.

JOSEPH FRANCES KRAMER. JOHN HJALMAR BLUM. Witnesses:

, FREDPCOBB', HARRY NORTH. 

